in fact, as ktvu's john sasaki reports of almost 1200 at-large offenders violating the tracker mandate, almost a thousand are sex offenders, and could be in or close to your neighborhood. >> reporter: this page from the department of correction bay come as a surprise, updated daily shows at-large paroles who have bailed on state's gps monitoring system including some sex-offenders from bay area counties, such as ronnie cook guilty of sexual battery and this man guilty of child molestation. >> ktvu contained this whittle blower letter that says paroloo officers are sounding the alarm by 150 paroled sex-offenders who could be living with minors or near schools and parks all in violation of their parole and no one is looking for this. >> you take off your ankle monitor that is the great tool to take care of the really bad guys and they take their ankle monitor off, bye. no problem. >> reporter: assembly bill 109 was the bill that changed the way the california prison system operated and some argues that removed the ability of the state to return sex-offenders to prison for parole violatio